The Sierra de Guadarrama has a series of valleys and zones which are of special interest from both a leisure and ecological viewpoint. The Rascafría Valley is an important hidrological source, downstream we can find the city of Madrid.

The proximity of Madrid's metropolitan area to the Guadarrama region generates a large number of visititors such as mountain climbers and tourists at all seasons. Here we present the spatial distribution of the GuMNet stations across the Guadarrama Mountains.